Related Experiment Video
Updated: Feb 6, 2026

Writing and Low-Temperature Characterization of Oxide Nanostructures
Published on: July 18, 2014
SnO2 Nanostructured Thin Films for Room-Temperature Gas Sensing of Volatile Organic Compounds
Kelsey Haddad, Ahmed Abokifa, Shalinee Kavadiya
1X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States.
Abstract:
We demonstrated room-temperature gas sensing of volatile organic compounds (VOCs) using SnO2 nanostructured thin films grown via the aerosol chemical vapor deposition process at deposition temperatures ranging from 450 to 600 °C. We investigated the film's sensing response to the presence of three classes of VOCs: apolar, monopolar, and biopolar. The synthesis process was optimized, with the most robust response observed for films grown at 550 °C as compared to other temperatures. The role of film morphology, exposed surface planes, and oxygen defects were explored using experimental techniques and theoretical calculations to improve the understanding of the room-temperature gas sensing mechanism, which is proposed to be through the direct adsorption of VOCs on the sensor surface. Overall, the improved understanding of the material characteristics that enable room-temperature sensing gained in this work will be beneficial for the design and application of metal oxide gas sensors at room temperature.
Related Concept Videos
Organic Compounds
Volatilization
Kinetic Molecular Theory and Gas Laws Explain Properties of Gas Molecules
The Sense of Self: Reflected Self-Appraisal and Social Comparison
Gas Laws: Boyle's, Gay-Lussac, Charles', Avogadro's, and Ideal Gas Law
Gas Exchange and Transport

